Eevee has been through many changes over the years, and it's also is a very difficult Pokémon to evolve. It's even harder to get all seven forms of Eevee. This guide will teach you how to evolve them.

Steps

1

Get seven Eevee. You'll be needing eight if you also want a spare, unevolved Eevee. Catching an Eevee in Pokémon Platinum is extremely difficult, but you can get your first one from Bebe in Hearthome City or in the Trophy Garden.

Breeding Eevee is the best option. Be sure to have a female Eevee or one of it's evolved forms, and another Pokémon in it's breeding group. To breed them, put two Eevee, one male and one female, in the Solaceon Daycare. Wait for a while and you will get a Pokémon egg that will hatch into an Eevee. Or, put Ditto and Eevee (any gender) in and you will get an Eevee egg.

2

Use a Water Stone on Eevee to get Vaporeon. Water Stones are found on Route 213 which is in the Solaceon Ruins. You can also get one on Route 230 if you have the Dowsing App on your Poketch.

3

Use a Fire Stone on Eevee to get Flareon. Fire Stones are found Solaceon Ruins, Fuego Ironworks (near Floroma, by surfing), and on Stark Mountain if you have the Dowsing App on your Poketch.

4

Use a Thunder Stone on Eevee to get Jolteon. Thunder Stones are found on Sunnyshore, by unearthing while underground, in Solaceon Ruins and Route 299 with the Dowsing App.

5

Level Eevee up to level 20 in Eterna Forest near the moss rock to get Leafeon. This will take some time, so be patient. Also, make sure you are close enough to the moss rock, otherwise you might get an Espeon or Umbreon.

6

Level Eevee up to level 20 on Route 217 near the ice rock to get Glaceon. Again, be close enough to the rock or you'll get another evolution. This will take more time than using one of the stones.

7

Level Eevee up with high enough friendship between 8PM and 4AM to get Umbreon. Be careful that you are not close to the moss rock or the ice rock, or it will fail. Make double sure that you have enough friendship.

8

Level up Eevee with max friendship between 4AM to 8PM to get Espeon. Here it is the same, make sure you have enough friendship and are not close to the rocks. If you are press B while its evolving.

Make sure to have two or more affection hearts and a fairy type move, then level it up. Be sure that you aren't near the ice rock or the moss rock or it won't work. And you can only get Sylveon in Generation VI (XYORAS) and Generation VII (SM).